Bioecology and control of bean weevil (Acanthoscelides obtectus Say.)

Abstract

The paper presents the results of experimental studies on the evolution of bean weevil (Acanthoscelides obtectus Say. (Coleoptera – Bruchidae) and the duration of development stages in this species, according to air temperature, rainfall and phenological phases of beans varieties Magna, Star and Avans, during 6 years (1994-1999), at the Agricultural Research Station of Podu-Iloaiei, Iaşi County. The pest developed a field generation and 2-3 generations in storehouses, after beans harvesting. It infested bean crops during floral button formation. Egg laying period coincided with grain formation in pods. The bean weevil was controlled by fumigation in storehouses and by tested and homologated insecticides in the field.